[FFmpeg-cvslog] CDXL demuxer and decoder
Paul B Mahol
git at videolan.org
Wed Feb 15 02:14:08 CET 2012
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Tue Feb 14 17:36:20 2012 +0000| [dc4e57489fa0f9cf4faf4c85cc405d6db77d84db] | committer: Diego Biurrun
CDXL demuxer and decoder
Signed-off-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Diego Biurrun <diego at biurrun.de>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=dc4e57489fa0f9cf4faf4c85cc405d6db77d84db
---
Changelog | 1 +
doc/general.texi | 4 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/cdxl.c | 278 ++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/cdxl.c | 170 ++++++++++++++++++++++++++++
libavformat/version.h | 2 +-
11 files changed, 460 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index cc7420c..8bcccf4 100644
--- a/Changelog
+++ b/Changelog
@@ -6,6 +6,7 @@ version <next>:
- XWD encoder and decoder
- Support for fragmentation in the mov/mp4 muxer
- ISMV (Smooth Streaming) muxer
+- CDXL demuxer and decoder
version 0.8:
diff --git a/doc/general.texi b/doc/general.texi
index 50ae764..14624bc 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -131,6 +131,8 @@ library:
@tab Multimedia format used by Delphine Software games.
@item CD+G @tab @tab X
@tab Video format used by CD+G karaoke disks
+ at item Commodore CDXL @tab @tab X
+ @tab Amiga CD video format
@item Core Audio Format @tab @tab X
@tab Apple Core Audio Format
@item CRC testing format @tab X @tab
@@ -435,6 +437,8 @@ following image formats are supported:
@tab fourcc: CSCD
@item CD+G @tab @tab X
@tab Video codec for CD+G karaoke disks
+ at item CDXL @tab @tab X
+ @tab Amiga CD video codec
@item Chinese AVS video @tab E @tab X
@tab AVS1-P2, JiZhun profile, encoding through external library libxavs
@item Delphine Software International CIN video @tab @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index a891651..2eaef6b 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -102,6 +102,7 @@ OBJS-$(CONFIG_C93_DECODER) += c93.o
OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdec.o cavsdsp.o \
mpeg12data.o mpegvideo.o
OBJS-$(CONFIG_CDGRAPHICS_DECODER) += cdgraphics.o
+OBJS-$(CONFIG_CDXL_DECODER) += cdxl.o
OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
OBJS-$(CONFIG_CLJR_DECODER) += cljr.o
OBJS-$(CONFIG_CLJR_ENCODER) += cljr.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index cda71e0..1c72177 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -86,6 +86,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (C93, c93);
REGISTER_DECODER (CAVS, cavs);
REGISTER_DECODER (CDGRAPHICS, cdgraphics);
+ REGISTER_DECODER (CDXL, cdxl);
REGISTER_DECODER (CINEPAK, cinepak);
REGISTER_ENCDEC (CLJR, cljr);
REGISTER_DECODER (CSCD, cscd);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 6afa140..51b956b 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -244,6 +244,7 @@ enum CodecID {
CODEC_ID_DXTORY,
CODEC_ID_V410,
CODEC_ID_XWD,
+ CODEC_ID_CDXL,
/* various PCM "codecs" */
CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
diff --git a/libavcodec/cdxl.c b/libavcodec/cdxl.c
new file mode 100644
index 0000000..a53a001
--- /dev/null
+++ b/libavcodec/cdxl.c
@@ -0,0 +1,278 @@
+/*
+ * CDXL video decoder
+ * Copyright (c) 2011-2012 Paul B Mahol
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/imgutils.h"
+#include "avcodec.h"
+#include "get_bits.h"
+
+typedef struct {
+ AVCodecContext *avctx;
+ AVFrame frame;
+ int bpp;
+ const uint8_t *palette;
+ int palette_size;
+ const uint8_t *video;
+ int video_size;
+ uint8_t *new_video;
+ int new_video_size;
+} CDXLVideoContext;
+
+static av_cold int cdxl_decode_init(AVCodecContext *avctx)
+{
+ CDXLVideoContext *c = avctx->priv_data;
+
+ avcodec_get_frame_defaults(&c->frame);
+ c->new_video_size = 0;
+ c->avctx = avctx;
+
+ return 0;
+}
+
+static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
+{
+ int i;
+
+ for (i = 0; i < c->palette_size / 2; i++) {
+ unsigned rgb = AV_RB16(&c->palette[i * 2]);
+ unsigned r = ((rgb >> 8) & 0xF) * 0x11;
+ unsigned g = ((rgb >> 4) & 0xF) * 0x11;
+ unsigned b = (rgb & 0xF) * 0x11;
+ AV_WN32(&new_palette[i], (r << 16) | (g << 8) | b);
+ }
+}
+
+static void bitplanar2chunky(CDXLVideoContext *c, int width,
+ int linesize, uint8_t *out)
+{
+ GetBitContext gb;
+ int x, y, plane;
+
+ init_get_bits(&gb, c->video, c->video_size * 8);
+ memset(out, 0, linesize * c->avctx->height);
+ for (plane = 0; plane < c->bpp; plane++)
+ for (y = 0; y < c->avctx->height; y++)
+ for (x = 0; x < width; x++)
+ out[linesize * y + x] |= get_bits1(&gb) << plane;
+}
+
+static void cdxl_decode_rgb(CDXLVideoContext *c)
+{
+ uint32_t *new_palette = (uint32_t *)c->frame.data[1];
+ int padded_width = FFALIGN(c->avctx->width, 16);
+
+ import_palette(c, new_palette);
+ bitplanar2chunky(c, padded_width, c->frame.linesize[0], c->frame.data[0]);
+}
+
+static void cdxl_decode_ham6(CDXLVideoContext *c)
+{
+ AVCodecContext *avctx = c->avctx;
+ uint32_t new_palette[16], r, g, b;
+ uint8_t *ptr, *out, index, op;
+ int x, y;
+
+ ptr = c->new_video;
+ out = c->frame.data[0];
+
+ import_palette(c, new_palette);
+ bitplanar2chunky(c, avctx->width, avctx->width, c->new_video);
+
+ for (y = 0; y < avctx->height; y++) {
+ r = new_palette[0] & 0xFF0000;
+ g = new_palette[0] & 0xFF00;
+ b = new_palette[0] & 0xFF;
+ for (x = 0; x < avctx->width; x++) {
+ index = *ptr++;
+ op = index >> 4;
+ index &= 15;
+ switch (op) {
+ case 0:
+ r = new_palette[index] & 0xFF0000;
+ g = new_palette[index] & 0xFF00;
+ b = new_palette[index] & 0xFF;
+ break;
+ case 1:
+ b = index * 0x11;
+ break;
+ case 2:
+ r = index * 0x11 << 16;
+ break;
+ case 3:
+ g = index * 0x11 << 8;
+ break;
+ }
+ AV_WN32(out + x * 3, r | g | b);
+ }
+ out += c->frame.linesize[0];
+ }
+}
+
+static void cdxl_decode_ham8(CDXLVideoContext *c)
+{
+ AVCodecContext *avctx = c->avctx;
+ uint32_t new_palette[64], r, g, b;
+ uint8_t *ptr, *out, index, op;
+ int x, y;
+
+ ptr = c->new_video;
+ out = c->frame.data[0];
+
+ import_palette(c, new_palette);
+ bitplanar2chunky(c, avctx->width, avctx->width, c->new_video);
+
+ for (y = 0; y < avctx->height; y++) {
+ r = new_palette[0] & 0xFF0000;
+ g = new_palette[0] & 0xFF00;
+ b = new_palette[0] & 0xFF;
+ for (x = 0; x < avctx->width; x++) {
+ index = *ptr++;
+ op = index >> 6;
+ index &= 63;
+ switch (op) {
+ case 0:
+ r = new_palette[index] & 0xFF0000;
+ g = new_palette[index] & 0xFF00;
+ b = new_palette[index] & 0xFF;
+ break;
+ case 1:
+ b = (index << 2) | (b & 3);
+ break;
+ case 2:
+ r = (index << 18) | (r & (3 << 16));
+ break;
+ case 3:
+ g = (index << 10) | (g & (3 << 8));
+ break;
+ }
+ AV_WN32(out + x * 3, r | g | b);
+ }
+ out += c->frame.linesize[0];
+ }
+}
+
+static int cdxl_decode_frame(AVCodecContext *avctx, void *data,
+ int *data_size, AVPacket *pkt)
+{
+ CDXLVideoContext *c = avctx->priv_data;
+ AVFrame * const p = &c->frame;
+ int ret, w, h, encoding, format, buf_size = pkt->size;
+ const uint8_t *buf = pkt->data;
+
+ if (buf_size < 32)
+ return AVERROR_INVALIDDATA;
+ encoding = buf[1] & 7;
+ format = buf[1] & 0xE0;
+ w = AV_RB16(&buf[14]);
+ h = AV_RB16(&buf[16]);
+ c->bpp = buf[19];
+ c->palette_size = AV_RB16(&buf[20]);
+ c->palette = buf + 32;
+ c->video = c->palette + c->palette_size;
+ c->video_size = buf_size - c->palette_size - 32;
+
+ if (c->palette_size > 512)
+ return AVERROR_INVALIDDATA;
+ if (buf_size < c->palette_size + 32)
+ return AVERROR_INVALIDDATA;
+ if (c->bpp < 1)
+ return AVERROR_INVALIDDATA;
+ if (c->bpp > 8) {
+ av_log_ask_for_sample(avctx, "unsupported pixel size: %d\n", c->bpp);
+ return AVERROR_PATCHWELCOME;
+ }
+ if (format) {
+ av_log_ask_for_sample(avctx, "unsupported pixel format: %d\n", format);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
+ return ret;
+ if (w != avctx->width || h != avctx->height)
+ avcodec_set_dimensions(avctx, w, h);
+
+ if (encoding == 0) {
+ if (c->video_size < FFALIGN(avctx->width, 16) *
+ avctx->height * c->bpp / 8)
+ return AVERROR_INVALIDDATA;
+ avctx->pix_fmt = PIX_FMT_PAL8;
+ } else if (encoding == 1 && (c->bpp == 6 || c->bpp == 8)) {
+ if (c->palette_size != (1 << (c->bpp - 1)))
+ return AVERROR_INVALIDDATA;
+ if (c->video_size < avctx->width * avctx->height * c->bpp / 8)
+ return AVERROR_INVALIDDATA;
+ avctx->pix_fmt = PIX_FMT_BGR24;
+ } else {
+ av_log_ask_for_sample(avctx, "unsupported encoding %d and bpp %d\n",
+ encoding, c->bpp);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ if (p->data[0])
+ avctx->release_buffer(avctx, p);
+
+ p->reference = 0;
+ if ((ret = avctx->get_buffer(avctx, p)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ p->pict_type = AV_PICTURE_TYPE_I;
+
+ if (encoding) {
+ av_fast_padded_malloc(&c->new_video, &c->new_video_size,
+ h * w + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!c->new_video)
+ return AVERROR(ENOMEM);
+ if (c->bpp == 8)
+ cdxl_decode_ham8(c);
+ else
+ cdxl_decode_ham6(c);
+ } else {
+ cdxl_decode_rgb(c);
+ }
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = c->frame;
+
+ return buf_size;
+}
+
+static av_cold int cdxl_decode_end(AVCodecContext *avctx)
+{
+ CDXLVideoContext *c = avctx->priv_data;
+
+ av_free(c->new_video);
+ if (c->frame.data[0])
+ avctx->release_buffer(avctx, &c->frame);
+
+ return 0;
+}
+
+AVCodec ff_cdxl_decoder = {
+ .name = "cdxl",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_CDXL,
+ .priv_data_size = sizeof(CDXLVideoContext),
+ .init = cdxl_decode_init,
+ .close = cdxl_decode_end,
+ .decode = cdxl_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 485b60e..56aadb2 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 0
+#define LIBAVCODEC_VERSION_MINOR 1
#define LIBAVCODEC_VERSION_MICRO 0
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavformat/Makefile b/libavformat/Makefile
index dd55e42..aa3cf7c 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -55,6 +55,7 @@ OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o mov_chan.o \
OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += cavsvideodec.o rawdec.o
OBJS-$(CONFIG_CAVSVIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_CDG_DEMUXER) += cdg.o
+OBJS-$(CONFIG_CDXL_DEMUXER) += cdxl.o
OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
OBJS-$(CONFIG_DAUD_MUXER) += daud.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index a60688c..f5be7aa 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -76,6 +76,7 @@ void av_register_all(void)
REGISTER_DEMUXER (CAF, caf);
REGISTER_MUXDEMUX (CAVSVIDEO, cavsvideo);
REGISTER_DEMUXER (CDG, cdg);
+ REGISTER_DEMUXER (CDXL, cdxl);
REGISTER_MUXER (CRC, crc);
REGISTER_MUXDEMUX (DAUD, daud);
REGISTER_DEMUXER (DFA, dfa);
diff --git a/libavformat/cdxl.c b/libavformat/cdxl.c
new file mode 100644
index 0000000..f2956dd
--- /dev/null
+++ b/libavformat/cdxl.c
@@ -0,0 +1,170 @@
+/*
+ * CDXL demuxer
+ * Copyright (c) 2011-2012 Paul B Mahol
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/opt.h"
+#include "avformat.h"
+#include "internal.h"
+
+#define CDXL_HEADER_SIZE 32
+
+typedef struct CDXLDemuxContext {
+ AVClass *class;
+ int sample_rate;
+ char *framerate;
+ AVRational fps;
+ int read_chunk;
+ uint8_t header[CDXL_HEADER_SIZE];
+ int video_stream_index;
+ int audio_stream_index;
+} CDXLDemuxContext;
+
+static int cdxl_read_header(AVFormatContext *s)
+{
+ CDXLDemuxContext *cdxl = s->priv_data;
+ int ret;
+
+ if ((ret = av_parse_video_rate(&cdxl->fps, cdxl->framerate)) < 0) {
+ av_log(s, AV_LOG_ERROR,
+ "Could not parse framerate: %s.\n", cdxl->framerate);
+ return ret;
+ }
+
+ cdxl->read_chunk = 0;
+ cdxl->video_stream_index = -1;
+ cdxl->audio_stream_index = -1;
+
+ s->ctx_flags |= AVFMTCTX_NOHEADER;
+
+ return 0;
+}
+
+static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ CDXLDemuxContext *cdxl = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint32_t current_size;
+ uint16_t audio_size, palette_size;
+ int32_t video_size;
+ int64_t pos;
+ int ret;
+
+ if (pb->eof_reached)
+ return AVERROR_EOF;
+
+ pos = avio_tell(pb);
+ if (!cdxl->read_chunk &&
+ avio_read(pb, cdxl->header, CDXL_HEADER_SIZE) != CDXL_HEADER_SIZE)
+ return AVERROR_EOF;
+ if (cdxl->header[0] != 1) {
+ av_log(s, AV_LOG_ERROR, "non-standard cdxl file\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ current_size = AV_RB32(&cdxl->header[2]);
+ palette_size = AV_RB16(&cdxl->header[20]);
+ audio_size = AV_RB16(&cdxl->header[22]);
+
+ if (palette_size > 512)
+ return AVERROR_INVALIDDATA;
+ if (current_size < audio_size + palette_size + CDXL_HEADER_SIZE)
+ return AVERROR_INVALIDDATA;
+ video_size = current_size - audio_size - CDXL_HEADER_SIZE;
+
+ if (cdxl->read_chunk && audio_size) {
+ if (cdxl->audio_stream_index == -1) {
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_tag = 0;
+ st->codec->codec_id = CODEC_ID_PCM_S8;
+ st->codec->channels = cdxl->header[1] & 0x10 ? 2 : 1;
+ st->codec->sample_rate = cdxl->sample_rate;
+ cdxl->audio_stream_index = st->index;
+ avpriv_set_pts_info(st, 32, 1, cdxl->sample_rate);
+ }
+
+ ret = av_get_packet(pb, pkt, audio_size);
+ if (ret < 0)
+ return ret;
+ pkt->stream_index = cdxl->audio_stream_index;
+ pkt->pos = pos;
+ pkt->duration = audio_size;
+ cdxl->read_chunk = 0;
+ } else {
+ if (cdxl->video_stream_index == -1) {
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_tag = 0;
+ st->codec->codec_id = CODEC_ID_CDXL;
+ st->codec->width = AV_RB16(&cdxl->header[14]);
+ st->codec->height = AV_RB16(&cdxl->header[16]);
+ cdxl->video_stream_index = st->index;
+ avpriv_set_pts_info(st, 63, cdxl->fps.den, cdxl->fps.num);
+ }
+
+ if (av_new_packet(pkt, video_size + CDXL_HEADER_SIZE) < 0)
+ return AVERROR(ENOMEM);
+ memcpy(pkt->data, cdxl->header, CDXL_HEADER_SIZE);
+ ret = avio_read(pb, pkt->data + CDXL_HEADER_SIZE, video_size);
+ if (ret < 0) {
+ av_free_packet(pkt);
+ return ret;
+ }
+ pkt->stream_index = cdxl->video_stream_index;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ pkt->pos = pos;
+ cdxl->read_chunk = audio_size;
+ }
+
+ return ret;
+}
+
+#define OFFSET(x) offsetof(CDXLDemuxContext, x)
+static const AVOption cdxl_options[] = {
+ { "sample_rate", "", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .dbl = 11025 }, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
+ { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "10" }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
+ { NULL },
+};
+
+static const AVClass cdxl_demuxer_class = {
+ .class_name = "CDXL demuxer",
+ .item_name = av_default_item_name,
+ .option = cdxl_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_cdxl_demuxer = {
+ .name = "cdxl",
+ .long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video format"),
+ .priv_data_size = sizeof(CDXLDemuxContext),
+ .read_header = cdxl_read_header,
+ .read_packet = cdxl_read_packet,
+ .extensions = "cdxl,xl",
+ .flags = AVFMT_GENERIC_INDEX,
+ .priv_class = &cdxl_demuxer_class,
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index 443d752..b944589 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 0
+#define LIBAVFORMAT_VERSION_MINOR 1
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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